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  1. #351
    Bad luck Chaz

    However I do seem to remember posting this about a week ago (post #283)

    "However my personal preference on big powerful machines is to have the home switches inside the boundries set by the limit switches, and have the limit switches trigger powering off of the drives. Also to have the limit switches within the boundries of mechanical stops that limit travel before ball screws over travel."

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  3. #352
    Quote Originally Posted by AndrewMawson View Post
    Bad luck Chaz

    However I do seem to remember posting this about a week ago (post #283)

    "However my personal preference on big powerful machines is to have the home switches inside the boundries set by the limit switches, and have the limit switches trigger powering off of the drives. Also to have the limit switches within the boundries of mechanical stops that limit travel before ball screws over travel."
    Hi Andrew, would a latched relay be suitable to perform the functions you describe?

  4. #353
    Chaz's Avatar
    Lives in Ickenham, West London, United Kingdom. Last Activity: 15 Hours Ago Has been a member for 4-5 years. Has a total post count of 721. Received thanks 33 times, giving thanks to others 21 times.
    Quote Originally Posted by Desertboy View Post
    Hi Andrew, would a latched relay be suitable to perform the functions you describe?
    Andrew, yes, point made. I thought of the same.

    Desertboy, fairly easily done with the CS Labs. It has sub 100ms error checking and can instantly disable the servos in a fault / trip condition.

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  6. #354
    I think the main point is to have a physical limit to save the ball screws if there is a runaway - preferably with a hard neoprene or other suitable plastic buffer.

    As for the latched relay then yes that's the easy way to do it, but it needs to be a fast acting relay.

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